Here is another cool old ad for radiation meters:
Radiation CounterMADE TO SELL FOR $150.00 - OFFERED FOR ONLY $47.50
(http://www.obsoleteindustrial.com/photos/radiation-meter.jpg)
- Employs the extra sensitive 1885 Bismuth Type Geiger Counter tube. Sensitivity is .05 Roentgens per hour
- Handy reset button
- Ideal for survey work, weighs only 5 1/2 pounds
- Decontamination is easy with damp cloth applied to the weatherproofed aluminum case
- A radioactive specimen is included for instrument checking and experiments
- Included at no extra charge - U.S. Atomic Energy Commission booklet titled "Prospecting with a Counter"
Indicates Radioactivity in 3 Ways!
1 - By Neon
2 - By Phone
3 - By Meter
RCA made one heck of a radiation meter. Just sayin'